Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 719 · 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: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
3. 3.🥭 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, check more (c) yes, mangoes match (d) no mango is sweet
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Saanvi is 6 years old. Kabir is 4 years older than Saanvi. How old is Kabir? (a) 10 (b) 11 (c) not enough info (d) 4
8. 8.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 6 PM (c) 7 PM (d) not enough info
9. 9.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Vihaan bought 5 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) not enough info (c) ₹40 (d) ₹200
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
13. 13.🧩 Arjun bought 2 notebooks and a lunch box for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹58 (b) ₹60 (c) ₹30 (d) not enough info
14. 14.🧩 Meera bought 5 pens for ₹225 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹50 (c) ₹225 (d) not enough info
15. 15.🧩 Nisha bought 4 kites for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹40 (c) not enough info (d) ₹140
16. 16.🧩 A box has 5 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 35 (b) 12 (c) not enough info (d) 42
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
18. 18.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 80 (c) 8 (d) not enough info
19. 19.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
20. 20.🧩 Meera bought 3 pens and a bag for ₹185 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹61 (c) ₹185 (d) ₹182
21. 21.🧩 Nisha bought 6 kites and a water bottle for ₹320 in all. Each kite cost the same. What did one kite cost? (a) ₹314 (b) not enough info (c) ₹320 (d) ₹53
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
24. 24.🧩 Rohan bought 6 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) not enough info (c) ₹20 (d) ₹25
25. 25.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) not enough info (c) 5 (d) 10
26. 26.🧩 Diya is 12 years old. Aarav is 7 years older than Diya. How old is Aarav? (a) not enough info (b) 19 (c) 7 (d) 20
27. 27.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
28. 28.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
29. 29.🧩 A box has 6 rows of apples, with 7 in each row. How many apples are in the box? (a) 49 (b) 42 (c) 13 (d) not enough info
30. 30.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 5 PM
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
32. 32.🧩 A box has 4 rows of apples, with 4 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 16 (d) 20
33. 33.🧩 Saanvi bought 3 kites and a bag for ₹205 in all. Each kite cost the same. What did one kite cost? (a) ₹68 (b) ₹205 (c) ₹202 (d) not enough info
34. 34.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
35. 35.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
36. 36.🧩 Meera bought 3 pens for ₹105 in all. Each pen cost the same. What did one pen cost? (a) ₹105 (b) ₹35 (c) not enough info (d) ₹40
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
38. 38.🧩 Aarav is 7 years old. Tara is 2 years older than Aarav. How old is Tara? (a) not enough info (b) 2 (c) 9 (d) 10
39. 39.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 9 PM
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence

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