Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 471 · 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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
5. 5.🧩 Aarav is 11 years old. Diya is older than Aarav. How old is Diya? (a) 16 (b) 12 (c) 13 (d) not enough info
6. 6.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
8. 8.🧩 Saanvi is 9 years old. Kabir is older than Saanvi. How old is Kabir? (a) 11 (b) 10 (c) 14 (d) not enough info
9. 9.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
10. 10.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.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
14. 14.🧩 Arjun is 8 years old. Nisha is 9 years older than Arjun. How old is Nisha? (a) not enough info (b) 9 (c) 18 (d) 17
15. 15.🧩 Arjun bought 6 mangoes and a water bottle for ₹390 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹384 (c) ₹65 (d) ₹390
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: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
18. 18.🧩 Kabir bought 2 kites for ₹40 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹25 (c) ₹40 (d) ₹20
19. 19.🧩 Tara bought 5 kites and a bag for ₹125 in all. Each kite cost the same. What did one kite cost? (a) ₹125 (b) ₹120 (c) ₹25 (d) not enough info
20. 20.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 36 (b) 12 (c) not enough info (d) 32
22. 22.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
23. 23.🧩 Ananya bought 5 kites and a water bottle for ₹265 in all. Each kite cost the same. What did one kite cost? (a) ₹260 (b) ₹265 (c) ₹53 (d) not enough info
24. 24.🧩 A box has 5 rows of apples, with 9 in each row. How many apples are in the box? (a) 14 (b) 54 (c) not enough info (d) 45
25. 25.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
26. 26.🧩 Nisha bought 2 mangoes for ₹70 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹35 (c) ₹70 (d) ₹40
27. 27.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
28. 28.🧩 Rohan bought 6 notebooks and a bag for ₹280 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹274 (c) ₹46 (d) ₹280
29. 29.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
30. 30.🧩 Arjun is 11 years old. Rohan is 5 years older than Arjun. How old is Rohan? (a) 16 (b) not enough info (c) 17 (d) 5
31. 31.🧩 Diya is 10 years old. Meera is 9 years older than Diya. How old is Meera? (a) 20 (b) 9 (c) 19 (d) not enough info
32. 32.🧩 Meera is 6 years old. Nisha is 9 years older than Meera. How old is Nisha? (a) 9 (b) not enough info (c) 16 (d) 15
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
34. 34.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
35. 35.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 9 PM
37. 37.🧩 Arjun bought 5 markers for ₹175 in all. Each marker cost the same. What did one marker cost? (a) ₹175 (b) ₹40 (c) not enough info (d) ₹35
38. 38.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 8 PM
39. 39.🧩 Vihaan bought 3 balls and a bag for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹127 (b) ₹130 (c) not enough info (d) ₹43
40. 40.🧩 Ishaan is 12 years old. Kabir is 9 years older than Ishaan. How old is Kabir? (a) 9 (b) not enough info (c) 21 (d) 22

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