Level 1 PSLE
Steven completed the race in 150 seconds. He was 25 seconds slower than Tom. How long did Tom take to complete the race? Give your answer in min and s. (Eg 1 min 2s)
Level 2 PSLE A box contained black balls and green balls. 40% of the balls were green. After some red balls were added to the box, 28% of the balls were green. What percentage of the balls in the box were red?