DAY 80:

Today’s Challenge

Each of the nine letters, A-I, in the two sections below has a subtraction calculation attached to it.  Which is the only letter that has the same answer in both sections?

  • Section 1

C:24–13  G:14–6  D:20–10  E:15–7  I:14–9  F:18–11  B:9–2  A:17–5  H:25–12

  • Section 2

I:16–3  A:15–1  H:20–8  C:19–9  G:12–4  E:11–5  F:21–6  D:14–7  B:27–18


The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 4th & 7th rows contain the following fourteen numbers:

3     4     10     11     24     27     30     32     35     44     54     60     70     77

What is the difference between the highest and lowest multiples of 4?



. . . can be found when clicking this.


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