The sum of the first 1 million primes is N. Without knowing N's value, one can determine that the ones'digit of N cannot be

1 answer:

3 0

All primes are odd, except two. Therefore the sum of the first million primes is one even number plus 999999 odd numbers. Since odd*odd = odd, the first million primes must be even + odd = odd.

An odd number obviously has an odd final digit, so the only option that can be firmly rules out is b (which is even).

You might be interested in

A bicycle is traveling at 12 miles per hour. How many feet will it cover in 60 seconds? Round your answer to the nearest tenth o

solniwko [45]

Answer:

0.2

Divide 12 by 60

4 0

2 years ago

The question about triangles is below.

rusak2 [61]

Answer:

Step-by-step explanation:

5 0

2 years ago

Which of the following is the graph of the inequality y< -2x + 3?

zaharov [31]

Answer:

look at the photo

Step-by-step explanation:

Since the inequality is already written in y=mx+b, you can easily graph the line. +3 is the y intercept, so one point would be (0,3). -2 resembles the slope, so diagonally to the left, you would go up 2 and across 1. Also, since the sign is "<" you would graph with a dotted line. Then to know which side to shade, I always use the coordinate (0,0). I plug in 0 for both x and y to see if (0,0) satisfies the inequality. In this case it does, so you would shade on the side where (0,0) is located.

3 0

3 years ago

Bap-fvjt-fxy aa jao sb<br>let's talk????

zhannawk [14.2K]

answer: What's up?????

3 0

2 years ago

Read 2 more answers

Triangle ABC is rotated 45° about point X, resulting in triangle EFD. If EF = 4.2 cm, DF = 3.6 cm, and DE = 4.5 cm, what is CB?

Margaret [11]

This is the concept of transformations, given that ABC was rotated it implies that it retained it's original dimensions. This means that ABC is proportional to EFD. Therefore, given that EF=4.2 cm, DF=3.6 cm and DE=4.5 cm. The CB=FD=3.6 cm

5 0

3 years ago

Read 2 more answers