How many times does the digit “5” appear in the numbers from 1 to 99?

(a)  

Calculate the value of 25 x 4 x 18 x 5 x 2.

(a)  

If a boat travelled 225  km in 3 hrs, what is its speed in kilometers per hour?

(a)  

Two numbers are in the ratio of 5:12. The bigger number is 108, what is the smaller?

(a)  

There are 2 424 math books in a library. This is 20% of the books in the library. How many books in the library are NOT math books?

(a)  

Use all the 4 one-digit prime numbers to form two fractions with the smallest possible sum.  What are the fractions?

(a)  

The perimeter of an isosceles triangle is 53 cm. If the base is 17 cm, find the length of each leg.

(a)  

What is the sum of the first seven prime numbers?

(a)  

Jana got 36 correct answers out of 40 items. How many percent did she got wrong?

(a)  

What digit is in the units place in the sum 45 + 65 + 25?

(a)  

Josefania is making a necklace with beads in a repeating pattern of red, blue, green, yellow, orange. What is the color of the 999th bead if the first bead is yellow?

(a)  

The ratio of two numbers is 2 ∶ 5, and their difference is 27. What is the larger number?

(a)  

A pair of standard six-sided dice is rolled. What is the probability of showing a dot sum of 10?

(a)  

On four long quizzes where the scores could be from 0 to 50, Lina had an average score of 40. What was the lowest score that she could have obtained on one test?

(a)