30-SECOND CHALLENGE

JUST follow the instructions from left to right, starting with the number given to reach an answer at the end of the row. Set your own 30-second challenge.

For the very young or arithmetically rusty, you

Beginner

Intermediate

Advanced

THE NATIONAL LOTTERY 9 10 17 32 58 8 16 23 29 38 have 30 seconds for the BEGINNER task.

For a greater challenge, try BEGINNER and INTERMEDIATE in 30 seconds. True mental gymnasts should try INTERMEDIATE and ADVANCED in 30 seconds together.