Mental Math

Percentage Playground

100

Increase 500 by 10%.

550

200

Decrease 2,400 by 20%.

1 920

300

Increase 1,200 by 5%.

1 260

400

Decrease 3,000 by 15%.

2 550

500

Increase 900 by 25%.

1 125

Time Twisters

100

How many minutes are in 3 hours?

180

200

Convert 3.25 hours into minutes.

195 minutes

300

If a bus leaves at 11:30 AM and the trip takes 2 hours and 50 minutes, what time will it arrive?

2:20 PM

400

A flight departs at 9:20 AM and lasts 5 hours and 45 minutes. What time does the flight land?

3:05 PM

500

A soccer game starts at 6:30 PM and lasts 1 hour and 45 minutes. What time does it end?

7 200

Rooted in Logic

100

What is 3²?

9

200

What is 4³?

64

300

What is 2⁴ x 3?

48

400

What is 5² + 2³?

33

500

What is 2³ x 5¹?

40

Pattern Puzzles

100

What is the next number in the sequence: 10, 20, 30, 40, ___?

50

200

Find the missing term: 5, 10, ___, 40, 80.

20

300

A sequence alternates between adding 3 and 2: 1, 4, 6, 9, ___. What’s the next number?

11

400

Solve for n in the sequence 2n−1: 

1, 3, 5, 7, ___.

9

500

A pattern triples each term: 1, 3, 9, ___. What’s the 5th term?

81

Decimal Dives

100

Add 8.45 and 6.9.

15.35

200

Subtract 35.6 from 48.25.

12.65

300

Multiply 0.6 by 7.5.

4.5

400

Divide 4.5 by 0.3.

15

500

Simplify (2.4 + 3.1) x 2.

11