Solve 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Evaluate

$210$

Solution Steps

Add $1$ and $2$ to get $3$.

$$3+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $3$ and $3$ to get $6$.

$$6+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $6$ and $4$ to get $10$.

$$10+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $10$ and $5$ to get $15$.

$$15+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $15$ and $6$ to get $21$.

$$21+7+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $21$ and $7$ to get $28$.

$$28+8+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $28$ and $8$ to get $36$.

$$36+9+10+11+12+13+14+15+16+17+18+19+20$$

Add $36$ and $9$ to get $45$.

$$45+10+11+12+13+14+15+16+17+18+19+20$$

Add $45$ and $10$ to get $55$.

$$55+11+12+13+14+15+16+17+18+19+20$$

Add $55$ and $11$ to get $66$.

$$66+12+13+14+15+16+17+18+19+20$$

Add $66$ and $12$ to get $78$.

$$78+13+14+15+16+17+18+19+20$$

Add $78$ and $13$ to get $91$.

$$91+14+15+16+17+18+19+20$$

Add $91$ and $14$ to get $105$.

$$105+15+16+17+18+19+20$$

Add $105$ and $15$ to get $120$.

$$120+16+17+18+19+20$$

Add $120$ and $16$ to get $136$.

$$136+17+18+19+20$$

Add $136$ and $17$ to get $153$.

$$153+18+19+20$$

Add $153$ and $18$ to get $171$.

$$171+19+20$$

Add $171$ and $19$ to get $190$.

$$190+20$$

Add $190$ and $20$ to get $210$.

$$210$$

Factor

$2\times 3\times 5\times 7$