Author name: Umar Draz

educationist

If the average of m numbers is n² and that of n numbers is m² , then the average of (m + n) numbers is?

A.

B.

C.

D.

Correct answer is: A.

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Ali is younger than Zia by 10 years. If 5 years back their ages were in the ratio 1:2, how old is Zia?

A. (A) 20 years

B. (B) 15 years

C. (C) 25 years

D. (D) None of these

Correct answer is: C. (C) 25 years

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4 + 4.44 + 44.4 + 4.04 + 444 = ?

A. 472.88

B. (B) 495.22

C. (C) 500.88

D. (D) None of these

Correct answer is: C. (C) 500.88

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The mean proportional between 64 and 81 is:

A.

B.

C.

D.

Correct answer is: A.

If the given value is 16a + 16b = 48. What is the average of a and b?

A. verage of a , b = ( a + b ) /2

B. 16a + 16b = 48

C. + b = 3 || divide each term by 16

D. The average is ( a + b ) / 2 = 3/2

Correct answer is: D. The average is ( a + b ) / 2 = 3/2

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A man spends Rs. 3500 per month and save 12 ½% of his income. His monthly income is?

A.

B.

C.

D.

Correct answer is: A.

If an alloy contains copper and silver in the ratio 3:7, then the percentage quantity of silver in the alloy is:

A. (A) 90%

B. (B) 70%

C. (C) 60%

D. (D) None of these

Correct answer is: B. (B) 70%

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The mean of five numbers is 18. If one number is excluded, their mean is 16. The excluded number is:

A.

B.

C.

D.

Correct answer is: A.

There were 600 students in a school. Each offered either English or Hindi or both. If 75% offered English and 45% Hindi, how many offered both?

A.

B.

C.

D.

Correct answer is: A.

A mixture contains 12% copper. How many kg of mixture is required to get 69 kg of copper?

A. (A) 424 kg

B. (B) 575 kg

C. (C) 828 kg

D. (D) None of these

Correct answer is: B. (B) 575 kg

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