Guinness And Math Guy Page

15/09/2026

To factor x² - 11x + 24, find two numbers that multiply to positive 24 and add to negative 11: -3 and -8. Therefore, (x - 3)(x - 8) = 0, giving x = 3 or x = 8.

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15/09/2026

To multiply 43 by 11, keep 4 and 3 on the outside and add them for the middle digit: 4, 7, 3. Therefore, 43 x 11 = 473. This direct version works when the two digits add to 9 or less.

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15/09/2026

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15/09/2026

Do not reach for a calculator when the bases can match. Rewrite 16 as 2^4, set x + 1 equal to 4, and get x = 3. Recognizing equivalent powers can save time on Digital SAT Math.

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15/09/2026

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15/09/2026

Square any whole number ending in 5 with this fast pattern. For 35², multiply 3 by the next number, 4, to get 12, then append 25. The answer is 1,225. Try the same method with 65².

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14/09/2026

Multiply 47 by 99 without long multiplication. Rewrite 99 as 100 - 1: 47 x 100 = 4,700, then subtract 47 to get 4,653. The shortcut is simple: multiply by 100 and subtract the original number.

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