The Main Challenge
If the number sequence 1 10 19 28 37 … is continued, which is the ONLY number from the following list that will appear later in the sequence?
105 115 125 135 145 155 165 175 185 195
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 1st & 3rd columns contain the following fourteen numbers:
4 12 13 15 17 21 22 27 35 55 56 60 80 81
What is the sum of the multiples of 7?
The Factors Challenge
Which of the numbers below are factors of 355?
3 5 7 9 11 13 15 None of them
The Mathematically Possible Challenge
Using 4, 8 and 12 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?
3 6 9 12 15 18 21 24 27 30
#3TimesTable
The Target Challenge
Can you arrive at 355 by inserting 3, 6, 7, 8 and 9 into the gaps below?
- (◯²+◯)×(◯+◯)÷◯ = 355
Answers can be found here.
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