Scroll:Mental Sums >> Mental Sums >> saq (1210)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

4 x 10 000 + 2 x 1000 + 2 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




2)  

2 x 10 000 + 8 x 1000 + 4 x 100 + 5 x 1 = _____        

What is the missing number in the blank


Answer:_______________




3)  

2 x 10 000 + 4 x 1000 + 7 x 100 + 8 x 1 = _____        

What is the missing number in the blank


Answer:_______________




4)  

3 x 10 000 + 3 x 1000 + 5 x 100 + 9 x 1 = _____        

What is the missing number in the blank


Answer:_______________




5)  

5 x 10 000 + 1 x 1000 + 2 x 100 + 5 x 1 = _____        

What is the missing number in the blank


Answer:_______________




6)  

4 x 10 000 + 7 x 1000 + 8 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




7)  

5 x 10 000 + 7 x 1000 + 2 x 100 + 3 x 1 = _____        

What is the missing number in the blank


Answer:_______________




8)  

1 x 10 000 + 9 x 1000 + 7 x 100 + 4 x 1 = _____        

What is the missing number in the blank


Answer:_______________




9)  

2 x 10 000 + 1 x 1000 + 6 x 100 + 4 x 1 = _____        

What is the missing number in the blank


Answer:_______________




10)  

6 x 10 000 + 5 x 1000 + 4 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




 

1)  

4 x 10 000 + 2 x 1000 + 2 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 42207


SOLUTION 1 :

Step 1: 4 x 10000 = 40000
Step 2: 2 x 1000 = 2000
Step 3: 2 x 100 = 200
Step 4: 7 x 1 = 7
Step 5: 40000 + 2000 + 200 + 7 = 42207

The missing number is 42207.



2)  

2 x 10 000 + 8 x 1000 + 4 x 100 + 5 x 1 = _____        

What is the missing number in the blank
Answer: 28405


SOLUTION 1 :

Step 1: 2 x 10000 = 20000
Step 2: 8 x 1000 = 8000
Step 3: 4 x 100 = 400
Step 4: 5 x 1 = 5
Step 5: 20000 + 8000 + 400 + 5 = 28405

The missing number is 28405.



3)  

2 x 10 000 + 4 x 1000 + 7 x 100 + 8 x 1 = _____        

What is the missing number in the blank
Answer: 24708


SOLUTION 1 :

Step 1: 2 x 10000 = 20000
Step 2: 4 x 1000 = 4000
Step 3: 7 x 100 = 700
Step 4: 8 x 1 = 8
Step 5: 20000 + 4000 + 700 + 8 = 24708

The missing number is 24708.



4)  

3 x 10 000 + 3 x 1000 + 5 x 100 + 9 x 1 = _____        

What is the missing number in the blank
Answer: 33509


SOLUTION 1 :

Step 1: 3 x 10000 = 30000
Step 2: 3 x 1000 = 3000
Step 3: 5 x 100 = 500
Step 4: 9 x 1 = 9
Step 5: 30000 + 3000 + 500 + 9 = 33509

The missing number is 33509.



5)  

5 x 10 000 + 1 x 1000 + 2 x 100 + 5 x 1 = _____        

What is the missing number in the blank
Answer: 51205


SOLUTION 1 :

Step 1: 5 x 10000 = 50000
Step 2: 1 x 1000 = 1000
Step 3: 2 x 100 = 200
Step 4: 5 x 1 = 5
Step 5: 50000 + 1000 + 200 + 5 = 51205

The missing number is 51205.



6)  

4 x 10 000 + 7 x 1000 + 8 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 47807


SOLUTION 1 :

Step 1: 4 x 10000 = 40000
Step 2: 7 x 1000 = 7000
Step 3: 8 x 100 = 800
Step 4: 7 x 1 = 7
Step 5: 40000 + 7000 + 800 + 7 = 47807

The missing number is 47807.



7)  

5 x 10 000 + 7 x 1000 + 2 x 100 + 3 x 1 = _____        

What is the missing number in the blank
Answer: 57203


SOLUTION 1 :

Step 1: 5 x 10000 = 50000
Step 2: 7 x 1000 = 7000
Step 3: 2 x 100 = 200
Step 4: 3 x 1 = 3
Step 5: 50000 + 7000 + 200 + 3 = 57203

The missing number is 57203.



8)  

1 x 10 000 + 9 x 1000 + 7 x 100 + 4 x 1 = _____        

What is the missing number in the blank
Answer: 19704


SOLUTION 1 :

Step 1: 1 x 10000 = 10000
Step 2: 9 x 1000 = 9000
Step 3: 7 x 100 = 700
Step 4: 4 x 1 = 4
Step 5: 10000 + 9000 + 700 + 4 = 19704

The missing number is 19704.



9)  

2 x 10 000 + 1 x 1000 + 6 x 100 + 4 x 1 = _____        

What is the missing number in the blank
Answer: 21604


SOLUTION 1 :

Step 1: 2 x 10000 = 20000
Step 2: 1 x 1000 = 1000
Step 3: 6 x 100 = 600
Step 4: 4 x 1 = 4
Step 5: 20000 + 1000 + 600 + 4 = 21604

The missing number is 21604.



10)  

6 x 10 000 + 5 x 1000 + 4 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 65407


SOLUTION 1 :

Step 1: 6 x 10000 = 60000
Step 2: 5 x 1000 = 5000
Step 3: 4 x 100 = 400
Step 4: 7 x 1 = 7
Step 5: 60000 + 5000 + 400 + 7 = 65407

The missing number is 65407.