SOLUTION: The tens digit of 2^100 is:
(a)4 (b) 5 (c) 6 (d) 7 (e) None of the above
Algebra.Com
Question 290231: The tens digit of 2^100 is:
(a)4 (b) 5 (c) 6 (d) 7 (e) None of the above
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
THE POWERS OF 2 ARE:
2
4
8
16
----
32
64
128
256
----
NOTE THE REPEAT SEQUENCE OF THE UNITS DIGIT.
EVERY FOURTH POWER ENDS IN THE DIGIT 6.
THUS THE 1,000 POWER WILL ALSO END IN A 6.
ANS. C)
RELATED QUESTIONS
B 2
× 7 B
6396
In the product shown above, B is a digit. The value of B is
(A) 3... (answered by unlockmath)
for how many integers 1 to 100 are tens digit twice the unit digit?
a)2
b)3
c)4
d)5
(answered by Edwin McCravy)
In the product B2×7B=6396, B is a digit. The value B =
a. 8
b. 7
c. 6
d. 5
e. None (answered by jim_thompson5910)
1) A warehouse contains 200 shoes of size 8, 200 shoes of size 9 and 200 shoes of size... (answered by psbhowmick)
What is the value of 2 – 4 + 6 – 8 + 10 – 12 + 14 ………. – 100 ?
(A) -50 (B) 0 (C) 50... (answered by richwmiller)
The total number of prime divisors of the natural number 2002 is:
(A) 2 (B) 3 (C) 4... (answered by jsmallt9)
The tens digit of a two-digit number is 3 and the units digit is H. if the two-digit... (answered by ankor@dixie-net.com)
The sum of the first 100 terms of the sequence 1, -2, 3, 4, -5, 6, 7, -8, 9, 10… is 1750. (answered by Edwin McCravy)
The sum of the first 100 terms of the sequence 1, -2, 3, 4, -5, 6, 7, -8, 9, 10… is 1750. (answered by Edwin McCravy)