MENTAL MATHS

Rajan got married 8 years ago. His present age is 6/5 times his age at the time of his marriage. Rajan's sister was 10 years younger to him at the time of his marriage. The age of Rajan's sister is:

• 32

• 36

• 38

• 40

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.3

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

The sum of two numbers is 28/25 of the first number. The second number is what

percent of the first?

• 12%

• 14%

• 16%

• 18%

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

He was a Greek mathematician known for shouting “Eureka!” in his bathtub.

• Pythagoras

• Archimedes

• Einstein

• Newton

The difference between the value of a number increased by 12.5% and the value of the original number decreased by 25% is 30. What is the original number?

• 40

• 60

• 80

• 120

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

The 26th multiple of a number is 1092. What is the 18th multiple of

that number?

• 746

• 756

• 676

• 566

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

Solve: 57 X 62

• 3534

• 3544

• 3244

• 3524

Tags

CCSS.3.OA.B.5

CCSS.3.OA.C.7

Three years back, a father was 24 years older than his son. At present the father is 5 times as old as the son. How old will the son be three years from now?

• 3 years

• 6 years

• 9 years

• 10 years

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

CCSS.HSA.CED.A.3

CCSS.HSA.REI.B.3

A poultry farm has only chickens and pigs. When the manager of the poultry counted the heads of the stock in the farm, the number totalled up to 200. However, when the number of legs was counted, the number totalled up to 540. How many more chickens were there in the farm? Note: Each pig had 4 legs and each chicken had 2 legs.

• 60

• 70

• 80

• 90

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

CCSS.HSA.CED.A.3

CCSS.HSA.REI.C.6

Complete the series: 4, 6, 12, 14, 28, 30, (?)

• 66

• 64

• 62

• 60

Tags

CCSS.HSF.BF.A.2

CCSS.HSF.IF.A.3

CCSS.HSF.LE.A.2

The area of a square field is 24200 sq m. How long will a lady take to cross the field diagonally at the rate of 6.6 km/hr?

• 3 minutes

• 2 minutes

• 1 minute

• 30 seconds

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1