Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 169 · 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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
2. 2.🧩 Nisha bought 5 markers and a bag for ₹235 in all. Each marker cost the same. What did one marker cost? (a) ₹47 (b) ₹230 (c) not enough info (d) ₹235
3. 3.🧩 A box has 8 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 56 (b) 63 (c) not enough info (d) 15
4. 4.🧩 Tara is 8 years old. Kabir is older than Tara. How old is Kabir? (a) 13 (b) not enough info (c) 10 (d) 9
5. 5.🥭 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
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Ishaan is 8 years old. Rohan is older than Ishaan. How old is Rohan? (a) 10 (b) 9 (c) 13 (d) not enough info
9. 9.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
10. 10.🧩 Aarav is 9 years old. Nisha is older than Aarav. How old is Nisha? (a) 10 (b) not enough info (c) 14 (d) 11
11. 11.🧩 Diya bought 2 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹25 (c) ₹50 (d) ₹30
12. 12.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 32 (b) 12 (c) 36 (d) not enough info
13. 13.🧩 A box has 7 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 13 (b) 48 (c) 42 (d) not enough info
14. 14.🧩 Ishaan bought 4 notebooks and a water bottle for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹176 (c) ₹180 (d) ₹45
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
16. 16.🧩 A box has 7 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 15 (c) 56 (d) 64
17. 17.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
18. 18.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
19. 19.🧩 Ananya is 7 years old. Kabir is 7 years older than Ananya. How old is Kabir? (a) 14 (b) 7 (c) not enough info (d) 15
20. 20.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
21. 21.🧩 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
22. 22.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
23. 23.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
24. 24.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
25. 25.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 7 PM
26. 26.🧩 Ananya bought 3 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹25
27. 27.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 20 (c) 15 (d) 8
28. 28.🧩 Nisha is 7 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 9 (b) not enough info (c) 12 (d) 8
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Arjun bought 4 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹120 (d) ₹35
31. 31.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 56 (c) 49 (d) 14
32. 32.🧩 Aarav bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹25 (c) not enough info (d) ₹125
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Ananya bought 5 balls and a lunch box for ₹360 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹360 (c) ₹72 (d) ₹355
35. 35.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
36. 36.🧩 Arjun bought 5 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹20 (c) ₹15 (d) ₹75
37. 37.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
38. 38.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True

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