Level 2
During a school anniversary celebration, pupils were required to line along both sides of the corridor to welcome the Guest-Of-Honor from the foyer to the hall. On the left row, the girls would stand 1 m apart from each other at an equal distance apart. On the right row, the boys would stand 2 m apart from each other. Both rows would have a girl and a boy standing at the beginning and at the end of the corridor. The corridor was 50 m long. How many pupils were required to line both sides of the corridor?

Level 3
A frog leaps across 18 lily pads which are of the same distance apart. It takes the frog 6 seconds to get from the 1st lily pad to the 3rd lily pad. How long does it take for the frog to leap from the 6th lily pad to the 17th lily pad.

Level 3
For every $5 of pocket money Charles saves, his father gives him $3 to add to his savings. If Charles saves $45 of his pocket money, how much would his total savings be?

Level 3
A shop sold 1 file for $8. For every 5 files sold, an additional file would be given free. If Mrs Yeo spent $80 on the files, how many files did she receive in total?

Level 3
Japheth bought 50 markers. For every 5 markers, he was given 3 markers for free. Each marker cost $2. How much did Japheth pay for the markers?