
Identifying Square Numbers Quiz
Authored by Eryl Jones
Mathematics
4th Grade

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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pa un o'r rhifau canlynol sy'n rhif sgwâr?
16
18
Answer explanation
Mae 16 yn rhif sgwâr oherwydd ei fod yn 4 x 4. Nid yw 18 yn rhif sgwâr gan nad oes rhif cyfan y gellir ei luosi â'i hun i gael 18.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Beth yw sgwâr 7?
47
48
49
50
Answer explanation
Mae sgwâr 7 yn cael ei gyfrifo trwy 7 x 7, sy'n rhoi 49. Felly, y dewis cywir yw 49.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pa rifau hyn nad yw'n rhif sgwâr?
36
49
64
50
Answer explanation
Mae 36 (6x6), 49 (7x7), a 64 (8x8) yn rifau sgwâr, ond nid yw 50 yn rhif sgwâr gan nad oes rhif cyfan sy'n ei feddiannu. Felly, y dewis cywir yw 50.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Beth yw sgwâr 5?
20
25
30
35
Answer explanation
Mae sgwâr 5 yn cael ei gyfrifo trwy luosi 5 â'i hun, sef 5 x 5, sy'n rhoi 25. Felly, y dewis cywir yw 25.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pa un o'r rhifau canlynol sy'n rhif sgwâr?
81
82
83
84
Answer explanation
Mae 81 yn rhif sgwâr oherwydd mae'n 9 x 9. Nid yw 82, 83 nac 84 yn rhifau sgwâr gan nad ydynt yn gallu cael eu hysgrifennu fel rhif cyfan wedi'i luosi â'i hun.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Beth yw sgwâr 9?
72
81
90
99
Answer explanation
Mae sgwâr 9 yn cael ei gyfrifo trwy 9 x 9, sy'n rhoi 81. Felly, y dewis cywir yw 81.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pa rifau hyn yw rhif sgwâr?
50
60
70
100
Answer explanation
Mae rhif sgwâr yn rhif sy'n cael ei fynnu trwy ei hunan. Mae 100 yn rhif sgwâr gan ei fod yn 10 x 10. Mae'r rhifau eraill (50, 60, 70) ddim yn rhifau sgwâr.
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