Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 675 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
2. 2.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
3. 3.🧩 Ishaan is 9 years old. Kabir is 5 years older than Ishaan. How old is Kabir? (a) not enough info (b) 14 (c) 15 (d) 5
4. 4.🧩 Arjun bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹10 (c) not enough info (d) ₹20
5. 5.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
8. 8.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Arjun bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹100 (b) ₹30 (c) not enough info (d) ₹25
13. 13.🧩 Nisha is 12 years old. Tara is older than Nisha. How old is Tara? (a) not enough info (b) 17 (c) 13 (d) 14
14. 14.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no mango is sweet (d) no, check more
15. 15.🧩 Diya bought 6 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹15 (c) ₹20 (d) ₹90
16. 16.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
18. 18.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
22. 22.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 45 (b) not enough info (c) 40 (d) 13
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Vihaan is 7 years old. Nisha is 3 years older than Vihaan. How old is Nisha? (a) not enough info (b) 3 (c) 11 (d) 10
26. 26.🧩 Arjun bought 3 markers and a water bottle for ₹80 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹77 (c) ₹26 (d) ₹80
27. 27.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
29. 29.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
31. 31.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 70 (c) 14 (d) 7
32. 32.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 13 (c) 48 (d) 42
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
36. 36.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 4 PM (d) 7 PM
37. 37.🧩 A box has 4 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) not enough info (b) 28 (c) 35 (d) 11
38. 38.🧩 Aarav is 11 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 12 (b) 16 (c) 13 (d) not enough info
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
40. 40.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True

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