Scholarship Exam Preparation App
Class 7 - (Math )
Number Work - Even, Odd numbers, prime, twin prime numbers, co-prime numbers, composite numbers
What is the sum of all pairs of Twin Prime numbers between 1 and 50?
a :
140
b :
144
c :
132
d :
224
Explanation :
Pairs: (3,5), (5,7), (11,13), (17,19), (29,31), (41,43).
Sum: (3+5) + (5+7) + (11+13) + (17+19) + (29+31) + (41+43)
= 8 + 12 + 24 + 36 + 60 + 84 = 224
Sum: (3+5) + (5+7) + (11+13) + (17+19) + (29+31) + (41+43)
= 8 + 12 + 24 + 36 + 60 + 84 = 224