exam Maths Puzzle Numerical Ability

how many four-digit numbers starting with 1 and ending with 5 can be written if the digits 1 2 3 4 5 6 7 8 9 are used, including the cases when a digit may appear twice in a given number?

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exam Other Question

An investment of $1500 paid interest of $45 during a certain period. How much interest would an investment of $2000 invested at the same rate for the same length of time pay? a map has a scale of 4 cm to 7km. which proprotion would not allow you to find the actual distance beween two cities if they are 10 cm apart on the map?

a. 4/10 = 7/x
b. 7/4 = x/10
c. 4/7 = 10/x
d. 4/10 = x/7