Math Magic-Grade 7 & 8

10^-2 means …=

• milli

• centi

• micro

• deci

The wages of 10 workers for a six-day week is $ 1200. What are the one day’s wages of 4 workers?

• $40

• $32

• $80

• $24

The square of which of the following would be even number?

• 1296

• 7779

• 1057

• 131

Which of the following is Hardy-Ramanujan Number ?

• 1724

• 1729

• 1725

• 1727

If each edge of a cube is doubled, its surface are will increase

• Two times

• Three times

• Four times

• Five times

In exponential form 149,600,000,000 m is given by

• 1.496 × 10¹¹ m

• 1.496 × 10⁸ m

• 14.96×10⁸ m

• 14.96 ×10 ¹¹m

What is the speed in m/s of a car that travels 30 km in 20 minutes?

• 150 m/s

• 105 m/s

• 25 m/s

• 140 m/s

How many diagonals has an octagon?

• 20

• 30

• 35

• 25

What is the angle between the minute hand of a clock and hour hand when the time is 7:20?

• 90

• 80

• 100

• 120

How many times can you subtract 100 from 2000?

• once

• twice

• thrice

• four times