Place value maths problems

This task is about many aspects of Number structure, including estimation, rounding, and place value.
Questions/instructions
Put a ring around the letter beside the best answer or write your answer on the line. You may write on these pages when working out your answer.

1.
Look at this picture of birds flying. About how many birds are in the picture? Do NOT count them – only estimate.
 
 
(A) Less than 100
(B) Between 100 and 1000
(C) More than 1000
(D) More than 10,000
 
2.
Which of the following is closest to 15 seconds?
 
 
(A) 14.1 seconds
(B) 14.7 seconds
(C) 14.9 seconds
(D) 15.2 seconds
 
3. 
2000 + 300 + 60 + 7 =
 
 
(A) 2367
(B) 20,367
(C) 23,067
(D) 23,607
 
4.
Which is one million?
 
 
(A) 10,000
(B) 100,000
(C) 1,000,000
(D) 10,000,000
 
5.
Which number is greatest?
 
 
(A) 2573
(B) 2537
(C) 2753
(D) 2735
 
6.
Which is an even number?
 
 
(A) 225
(B) 233 
(C) 370
(D) 391
 
7.
What is 18,565 rounded to the nearest thousand?
 
 
(A) 18,000
(B) 18,600
(C) 19,000
(D) 20,000