Recent questions in Class 7

5^{2^5} = 5^x Find the value of x.

asked Oct 14, 2015 by pady_1

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4^{14}\times 4^4 = ?

asked Oct 14, 2015 by pady_1

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7^3\times 7^7 = ?

asked Oct 14, 2015 by pady_1

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Find the value of (-1)^{501}

asked Oct 14, 2015 by pady_1

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Give exponential form for 8324 \times 8324 \times 8324\times 8324

asked Oct 14, 2015 by pady_1

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Give exponential form for (–P) × (–P) × (–P) × (–P) × (–P)

asked Oct 14, 2015 by pady_1

1 answer

2^6 = ?

asked Oct 14, 2015 by pady_1

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If 2^x + 2^{ x + 1} = 48, find the value of x.

asked Oct 14, 2015 by pady_1

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2^4 × (-3)^2 = ?

asked Oct 14, 2015 by pady_1

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Simplify following and write answer in exponential form \large\frac{5^7 \times 5^7 \times 5^9}{5^9}\times 5^2 \times 5^7 = ?

asked Oct 14, 2015 by pady_1

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Simplify the following and write the answer in exponential form 3^9 \times 3^4 \times 3^6 = ?

asked Oct 14, 2015 by pady_1

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3^4 × (-3)^4 = ?

asked Oct 14, 2015 by pady_1

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Balvinder plants a jasmine on his 8th birthday. If the plant has one jasmine to start with, and number of jasmines triples every week, then how many jasmines will be there after x weeks?

asked Oct 14, 2015 by pady_1

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What is the remainder when 2^{25} is divided by 5?

asked Oct 14, 2015 by pady_1

1 answer

Simplify following and write answer in exponential form 27^3 \times 27^7 \times 27^7 = ?

asked Oct 14, 2015 by pady_1

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Simplify following and write answer in exponential form \large\frac{9^3 \times 3^7}{9^6 × 27^5}\times 9^8 = ?

asked Oct 14, 2015 by pady_1

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(-3)x \times (-3)2 = -243 Find value of x.

asked Oct 14, 2015 by pady_1

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What is the remainder when 2^{70} is divided by 5?

asked Oct 14, 2015 by pady_1

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Simplify following and write answer in exponential form 4^7 \times 8^3 \times 8^9 \times 2^6 \times 8^4 \div 2^4 = ?

asked Oct 14, 2015 by pady_1

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Simplify following and write answer in exponential form \large\frac{7^6 \times 7^5 \times 7^2}{7^5 \times 7^6}\times 7^7 \times 7^8 = ?

asked Oct 14, 2015 by pady_1

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What is the remainder when 2^{46} is divided by 10?

asked Oct 14, 2015 by pady_1

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Simplify following and write answer in exponential form 125^4 \times 125^8 \times 25^5 \times 5^5 \div 5^5 = ?

asked Oct 14, 2015 by pady_1

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If * be an operation such that $cd = cd(c-d)^2$,then $43$ equals ________

asked Oct 14, 2015 by pady_1

1 answer

Maria had some boxes and she bought seven more boxes. A week later half of all her boxes were destroyed in a fire. There are now only 22 boxes left. With how many did she start?

asked Oct 14, 2015 by pady_1

1 answer

An amount of Rs. 21000 is made up of Rs. 100, 50, 20 and 10 notes. The number of Rs.10 notes are 5 times the number of Rs.20 notes. The number of Rs.20 notes are 5 times the number of Rs.50 notes. The number of Rs.50 notes are 5 times the number of Rs.100 notes. How many Rs.20 notes are there?

asked Oct 14, 2015 by pady_1

1 answer

Solve the equations to find value of variable in equation $-3( -3b - 1) + 2(3b + 2) = - (3b + 47)$

asked Oct 14, 2015 by pady_1

1 answer

Sum of digits in a two digit number is 7. If 9 is added to the number, digits of the number are interchanged. Find the new number.

asked Oct 14, 2015 by pady_1

1 answer

Bala had some packs of cards (each pack contains 7 cards). He gave away 22 cards to his friend Aditya. If a is the number of packs Bala originally had, how many cards are left with Bala ?

asked Oct 14, 2015 by pady_1

1 answer

In a school 36% students are girls. If there are 364 less girls than boys. Find total number of students in the school.

asked Oct 14, 2015 by pady_1

1 answer

7th grade has collected $200 for a field trip that would cost at least $600. The teachers decided to ask $50 from additional students to cover the cost. How many students must pay to cover the cost?

asked Oct 14, 2015 by pady_1

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Mark had some money. He gave half of that to his brother and then he gave another $5$ to his sister. He now has $20$. How much money Mark had in the beginning?

asked Oct 14, 2015 by pady_1

1 answer

The sum of three consecutive numbers is 72. What is the smallest of these number?

asked Oct 14, 2015 by pady_1

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331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus.

asked Oct 14, 2015 by pady_1

1 answer

You bought a magazine for $5 and four erasers. You spent a total of $25. How much did each eraser cost?

asked Oct 14, 2015 by pady_1

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Evaluate the expression −9+\large\frac{n}{2}−5n using n=4

asked Oct 14, 2015 by pady_1

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Sarah babysat 7 times as many hours during summer break as she did during spring break. She babysat a total of 56 hours during both breaks. How many hours did Sara babysit during spring break?

asked Oct 14, 2015 by pady_1

1 answer

Jill sold half of her comic books and then bought sixteen more. She now has 36. With how many did she begin?

asked Oct 14, 2015 by pady_1

1 answer

Add: 14x + 10y – 12xy – 13, 18 – 7x – 10y + 8xy, 4xy

asked Oct 14, 2015 by pady_1

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What is the value of x that make this statement true? 4x+15=2x+63

asked Oct 14, 2015 by pady_1

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What should be added to x^2 + xy + y^2 to obtain 2x^2 + 3xy?

asked Oct 14, 2015 by pady_1

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Find the value of 100 - 10x^3 for x = 2.

asked Oct 14, 2015 by pady_1

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The number of children at the library was 3 times the number of adults. The total number of people at the library was 48. How many children were at the library.

asked Oct 14, 2015 by pady_1

1 answer

Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2. 3x – 5a – x2+ 9b

asked Oct 14, 2015 by pady_1

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Simplify combining like terms: 3a – 2b – ab – (a – b + ab) + 3ab + b – a

asked Oct 14, 2015 by pady_1

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Kim is 3 times as old as her cousin. The total of their ages is 36 years. How old is Kim's cousin?

asked Oct 14, 2015 by pady_1

1 answer

What should be taken away from 3x^2 – 4y^2 + 5xy + 20 to obtain – x^2 – y^2 + 6xy + 20?

asked Oct 14, 2015 by pady_1

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Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

asked Oct 14, 2015 by pady_1

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What is the correct solution for x in the following equation: 5x+11=41

asked Oct 14, 2015 by pady_1

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Simplify the following: 2y + 9 + 8y + 7

asked Oct 14, 2015 by pady_1

1 answer

What is the value of the expression below when t=2? (7+t)−(t+4)

asked Oct 14, 2015 by pady_1

0 answers

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