exam Maths Puzzle Numerical Ability

Two plans leave Chicago - one travelling due east and the other due west. The first travels 100 miles per hour faster than the second. How long will it be until they are 2000 miles

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exam Other Question

Bob invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%?
A). $11,000

B). $12,000

C). $8,000

D). $13,000 Can someone help me with these three problems.

I have to solve this equation.

1) sqrt2x+1+x=7

Simplify the radical expressions.

2) sqrt3*sqrt6

3) 18-sqrt20/2

The