Tag: math & puzzles

Questions Related to math & puzzles

Certain money becomes double in 4 years according to simple interest. In how many years, will it becomes 3 times?
general knowledge math & puzzles

  1. 8 years

  2. 10 years

  3. 12 years

  4. 2 years

Show answer
Correct Option: A

Certain money doubles itself according to compound interest in 3 years. How much time it takes to become 4 times?

general knowledge math & puzzles

  1. 10 years

  2. 6 years

  3. 2 years

  4. 8 years

Show answer
Correct Option: B

If x and y are the two digits f the number 653xy such that this number is divisible by 80, then x+y is equal to:

general knowledge math & puzzles

  1. 2

  2. 3

  3. 4

  4. 6

Show answer
Correct Option: D

The smallest number which when diminished by 3 is divisible by 21,28,36 and 45 is...
general knowledge math & puzzles

  1. 869

  2. 859

  3. 1263

  4. 427

Show answer
Correct Option: C

If 1.5x=0.04y then the value of (y-x)/(y+x) is

general knowledge math & puzzles

  1. 730/77

  2. 73/77

  3. 7.3/77

  4. None

Show answer
Correct Option: B

The average age of a class is 15.8 years. The average age of boys in the class is 16.4 years while that of girls is 15.4 years. What is the ratio of boys to girls in the class?
general knowledge math & puzzles

  1. 1:3

  2. 3:4

  3. 3:5

  4. None Of These

Show answer
Correct Option: D

If one-seventh of a number exceeds its eleventh part by 100 then the number is…

general knowledge math & puzzles

  1. 770

  2. 1100

  3. 1825

  4. 1925

Show answer
Correct Option: D

The ratio of Rita's age to her mother's age is 3:8. The difference of their ages is 35 years. The ratio of their ages after 4 years will be:
general knowledge math & puzzles

  1. 7:12

  2. 5:12

  3. 38:43

  4. 42:47

Show answer
Correct Option: B

Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should these be mixed to get an alloy 15 times as heavy as water?

general knowledge math & puzzles

  1. 1:1

  2. 2:3

  3. 1:2

  4. 3:2

Show answer
Correct Option: D

A tap can fill the tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be:

general knowledge math & puzzles

  1. filled in 12 min

  2. emptied in 12 min

  3. filled in 8 min

  4. emptied in 8 min

Show answer
Correct Option: D