Game

Which of the followings are equal to ab (more than one answer)

If LCM(2x;3x)=LCM(45;100), fin x

• 250

• 150

• 300

• 900

There are how many numbers less than 45 and co-prime with it.

• 24

• 20

• 30

• 6

Find the numbers of the positive factors of 420

• 42

• 7

• 30

• 24

• a=1; b=1

• a=1,4,7; b=6

• a=4; b=6

• a=1,4; b=6,7

• 16

• 20

• 18

• 14

The first worker do a certain work in 5 hours and the second in 6 hours. If they work together for 2 hours which part of the work will remain?

• 513

• 411

• 511

• 531

50% of 20% of a number is equal to what part of a number

• 0.001

• 0.0001

• 0.01

• 0.1

If the price of goods firstly increased 20%, then decreased 30%. Find that how the initial price is changed.

• 10%

• 16%

• 24%

• 36%