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Number Detective

Follow the clues to find the mystery number.

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Six Is the Sum

What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?

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ABC

In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. Can you reconstruct the original multiplication?

Spell by Numbers

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

Can you substitute numbers for the letters in these sums?

tea cup hip joint. foot. father and son. pig. huts.

TEA+SEA=EAT, TOO+TIP=HIP, TOE+HO=THE, GOT+SUP=HUG, PIG+SO=PEG, HIT+TO=HUT.

Did you know? Mathematical problems in which you replace digits with letters that make words or even phrases are called CRYPTARITHMS.