Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 23 = ?27
- 23 = 14?
- 78 = 1416 = ?32
- 13 = 26 = 7?
(a)
23 =
2 x 93 x 9 =
1827 (b)
23 =
2 x 73 x 7 =
1421 (c)
78 =
1416 =
14 x 216 x 2 =
2832 (d)
13 =
26 =
1 x 73 x 7 =
721Answer(s): 18, 21, 28, 21