Solve 1+1+2+1+2+3+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7

$$1+1+2+1+2+3+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Evaluate

$$84$$

Solution Steps

Add 1 and 1 to get 2.

$$2+2+1+2+3+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 2 and 2 to get 4.

$$4+1+2+3+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 4 and 1 to get 5.

$$5+2+3+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 5 and 2 to get 7.

$$7+3+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 7 and 3 to get 10.

$$10+1+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 10 and 1 to get 11.

$$11+2+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 11 and 2 to get 13.

$$13+3+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 13 and 3 to get 16.

$$16+4+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 16 and 4 to get 20.

$$20+1+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 20 and 1 to get 21.

$$21+2+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 21 and 2 to get 23.

$$23+3+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 23 and 3 to get 26.

$$26+4+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 26 and 4 to get 30.

$$30+5+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 30 and 5 to get 35.

$$35+1+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 35 and 1 to get 36.

$$36+2+3+4+5+6+1+2+3+4+5+6+7$$

Add 36 and 2 to get 38.

$$38+3+4+5+6+1+2+3+4+5+6+7$$

Add 38 and 3 to get 41.

$$41+4+5+6+1+2+3+4+5+6+7$$

Add 41 and 4 to get 45.

$$45+5+6+1+2+3+4+5+6+7$$

Add 45 and 5 to get 50.

$$50+6+1+2+3+4+5+6+7$$

Add 50 and 6 to get 56.

$$56+1+2+3+4+5+6+7$$

Add 56 and 1 to get 57.

$$57+2+3+4+5+6+7$$

Add 57 and 2 to get 59.

$$59+3+4+5+6+7$$

Add 59 and 3 to get 62.

$$62+4+5+6+7$$

Add 62 and 4 to get 66.

$$66+5+6+7$$

Add 66 and 5 to get 71.

$$71+6+7$$

Add 71 and 6 to get 77.

$$77+7$$

Add 77 and 7 to get 84.

$$84$$

Factor

$$2^{2}\times 3\times 7$$