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Decimal Secrets Unlocked

Grade 9 · Mathematics · 16 questions · Mixed

Understand how rational numbers behave in decimal form and why irrational numbers never repeat. This assignment strengthens conceptual clarity and connects fractions to decimals. Skills Covered: Converting fractions to decimals Identifying repeating vs non-repeating decimals Linking decimals to rational numbers

Name: ________________________Date: __________________Score: ______ / 16
Question 1true false
49\sqrt{49} is an irrational number.
○True
○False
Question 2true false
Every non-terminating decimal is irrational.
○True
○False
Question 3mcq
Which decimal is terminating?
A.0.333...
B.0.25
C.2.121212...
D.√11
Question 4fill blank
0.625 is a [blank] number.
Answer: ________________________________
Question 5fill blank
√11 is [blank].
Answer: ________________________________
Question 6mcq
Which number is irrational?
A.0.123456789101112...
B.0.125
C.7/8
D.√81
Question 7mcq
Which expression is rational?
A.2+8\sqrt{2}+\sqrt{8}
B.50−42\sqrt{50} - 4 \sqrt{2}
C.5\sqrt{5} × 15\sqrt{15}
D.8\sqrt{8} × 18\sqrt{18}
Question 8mcq
Which expression is irrational?
A.182\frac{\sqrt{18}}{\sqrt{2}}
B.√2 + √8
C.√50 - 4√2
D.√27 - 3√3
Question 9mcq
Which of these is irrational?
A.9/4
B.0.04
C.√12
D.-5
Question 10mcq
Which number is rational?
A.0.375
B.√15
C.π
D.√7
Question 11mcq
Which statement is correct?
A.Every irrational number is a whole number.
B.Every rational number can be written as p/q with q ≠ 0.
C.Every decimal is irrational.
D.No integer is rational.
Question 12mcq
Which number is irrational?
A.-7/8
B.1.5
C.√81
D.√6
Question 13mcq
Which decimal is non-terminating repeating?
A.0.080808
B.1.272727...
C.3.14
D.1.2345
Question 14mcq
Which is an example of a rational number?
A.√2
B.π
C.√49
D.√5
Question 15mcq
Which number is irrational?
A.0.125
B.7/9
C.√16
D.√3
Question 16mcq
Which is a rational number?
A.5/8
B.√7
C.π
D.√11