Answer is: add 4 in between every time
Explanation:
in 45 and 49 there is difference of 4
and in the next 61 and 69 the difference is 8
every it adds 4
i hope you get the idea
Even # --------- if it ends with 0, # of ways = 6*5*4 = 120 if not, 3 ways for ending digit, 5 ways for 1st digit, 5*4 for middle digits = 300
so total ways = 420
odd # --------- 4 ways of ending digit, 5 ways for 1st digit, 5*4 for middle digits = 400 ways
< 4000: ---------- 3 ways for starting digit, 6*5*4 ways for remaining digits = 360 ways
> 3000 & < 4000 ------------------------ 1 way for starting digit , 6*5*4 for remaining digits = 120 ways
Answer:
m
Step-by-step explanation:
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Answer:
f = - 5
Step-by-step explanation:
9(f+3) = -18
9f + 27 = - 18
9f = - 18 - 27
9f = - 45
f = - 45 : 9
f = - 5
Answer:
The numbers are 5 and 20 respectively.
Step-by-step explanation:
Let two numbers are x and y.
According to question-
x + y = 25...............................(i)
Given x is smaller number and y is larger number.
then,
2 y - 3 x = 25..........................(ii)
To solve equation (i) and (ii)-
Firstly multiply by 3 in equation (i) and then add in equation (ii)-
<em> 3 x + 3 y = 75</em>
<em><u>- 3 x + 2 y = 25</u></em>
<em><u>5 y = 100</u></em>
<em>y = 20</em>
Put y = 100 in equation (i)-
We get,
<em>x = 25 - 20</em>
<em>x = 5</em>
<em>Therefore x = 5 and y = 20 .</em>
