Question

What is value of the digits in the units place of the following:
1 x 3 x 5 x 7 x 9 x 11 x 13 x 2007 x 2009

Answer 1

Answer:

Unit digit in (6374)1793 = Unit digit in (4)1793

    = Unit digit in [(42)896 x 4]

    = Unit digit in (6 x 4) = 4

Unit digit in (625)317 = Unit digit in (5)317 = 5

Unit digit in (341)491 = Unit digit in (1)491 = 1

Required digit = Unit digit in (4 x 5 x 1) = 0.

■.HOPE IT HELPS YOU. ■

Answer 2

Step-by-step explanation:

Spectrum

Visible, 7000 - 4000, 7 x 10-5 - 4 x 10-5, 4.3 x 1014 - 7.5 x 1014, 2 - 3. Ultraviolet, 4000 - 10, 4 x 10-5 - 10-7, 7.5 x 1014 - 3 x 1017, 3 - 103.